. >> host: and finally, michael e-mails in, do you think that peer progressive networks will be amplified by the rapid adoption of the mobile internet in developing nations? >> guest: yes. um, because they're the places where one of the big things you have is maas i have cities being developed where you have huge needs like the kind of infrastructure feeds we talk about, and the idea that cities are going to be walking around with these mobile computers that are far more powerful than anybody's computer was 20 years ago, it's going to be a tremendous opportunity for these cities solve problems. just like john snowe and henry white had walking around london in 1854, they were looking for patterns in the day. but they didn't have real technology that let them notice those patterns or report them. now in these new emerging, you know, mega cities, we're going to have tremendous resources available. >> host: and we'll finish with a quote from the both map. with the exception of the earth atmosphere, the city is life's largest footprint and microbes are its smallest. it is a great testimony to